# 软航PDF阅读器 vs NAS Vista

The clearest difference is in-app purchases: 软航PDF阅读器 at none against NAS Vista's 3. 软航PDF阅读器 also leads on update cadence (every 2 days vs every 5 weeks) and iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. NAS Vista sells 3 in-app purchases, starting at $0.99 per month. 软航PDF阅读器 asks for nothing beyond the download.

软航PDF阅读器 ships an update every 2 days, NAS Vista every 5 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 软航PDF阅读器 | NAS Vista |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 5 weeks |
| Size | 10 MB | 127 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chongqing Ruanhang Technology Co., Ltd.](https://appshunter.io/developer/1538523893) | [zhang pan](https://appshunter.io/developer/1367866213) |

## What reviewers say

### 软航PDF阅读器

[App page](https://appshunter.io/ios/app/pdf/id1540740963)

**Features:** macOS Compatibility

**In-app purchases:** none


### NAS Vista

[App page](https://appshunter.io/ios/app/nas-vista/id6748807888)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription Service | $0.99 | per month |
| 1-Month Subscription (Direct) | $0.99 | per month |
| Lifetime Subscription | $39.99 | one-time |


## Frequently asked questions

### Is 软航PDF阅读器 free?

软航PDF阅读器 is free to download, with no in-app purchases.

### Is NAS Vista free?

NAS Vista is free to download, with in-app purchases available.

### Do 软航PDF阅读器 or NAS Vista have ads?

Neither 软航PDF阅读器 nor NAS Vista shows ads.

### Which is updated more often, 软航PDF阅读器 or NAS Vista?

软航PDF阅读器 ships an update every 2 days, and NAS Vista every 5 weeks. Most recently, 软航PDF阅读器 was updated on November 3, 2026 and NAS Vista on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*